/Engine/Source/Runtime/Messaging/Public/IAuthorizeMessageRecipients.h
Authorizes a request to remove a subscription for the specified topic pattern.
true if the request is authorized, false otherwise.
virtual bool AuthorizeUnsubscription ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMessageReceiver](API\Runtime\Messaging\IMessageReceiver), ESPMode::ThreadSafe > & Subscriber, const [FName](API\Runtime\Core\UObject\FName) & TopicPattern )